A pressure-regulating arrangement includes a main line through which a flow can pass from an intake to an output and in which an adjustable nozzle is arranged. The pressure-regulating arrangement further includes a pressure-regulating valve having a pressure connection which is connected to the main line downstream of the nozzle. A valve body of the pressure-regulating valve is movable from a basic position in an opening direction to increase an outlet pressure of an outlet connection. A first pressure which is tapped off from the main line upstream of the nozzle acts in the opening direction. The outlet pressure and a second pressure, which is tapped off from the main line downstream of the nozzle, act in a closing direction, which is opposed to the opening direction, in order to reduce the outlet pressure.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A pressure-regulating arrangement, comprising: a main line, in which an adjustable nozzle is arranged; and a pressure-regulating valve having a pressure connection, a tank connection and a regulating outlet, wherein; the pressure connection is connected to the main line downstream of the nozzle; an outlet pressure at the regulating outlet is adjustable via the pressure-regulating valve; a valve body of the pressure-regulating valve is acted upon by a first pressure of the main line upstream of the nozzle in a direction of connecting the regulating outlet to the pressure connection and increasing the outlet pressure, and by the outlet pressure and a second pressure of the main line downstream of the nozzle in a direction of connecting the regulating outlet to the tank connection and reducing the outlet pressure, wherein the valve body is precentered in a basic position by a spring arrangement, the spring arrangement including a spring with two end sections which are movable and in which a pretensioning of the spring is adjustable; wherein a connection from the pressure connection to the regulating outlet is openable in an opening direction; and wherein a connection from the regulating outlet to the tank connection of the pressure-regulating valve is openable in a closing direction.
2. The pressure-regulating arrangement according to claim 1 , wherein: the valve body is a stepped piston; a first control surface, which is acted upon by the first pressure, and a first control pressure space are formed in a region of a first end section of the stepped piston; a second control surface, which is acted upon by the second pressure, and a second control pressure space are formed in a region of a second end section of the stepped piston; and an annular surface which is acted upon by the outlet pressure is arranged between the first end section and the second end section.
3. The pressure-regulating arrangement according to claim 2 , further comprising a channel section of the main line which runs approximately parallel to the stepped piston, the channel section having an end, wherein: the nozzle is arranged in an approximately right-angled bend of the main line at the end of the channel section, as viewed in a direction of flow; and the nozzle is formed by a first passage opening and a second passage opening which are movable with respect to each other.
4. The pressure-regulating arrangement according to claim 3 , wherein: the first passage opening is provided on a housing; and the second passage opening is formed in a circular cylindrical adjusting part which is rotatable about an axis of rotation which runs approximately at a right angle to the channel section.
5. The pressure-regulating arrangement according to claim 2 , wherein: the first control surface and the second control surface are much larger than the annular surface.
6. The pressure-regulating arrangement according to claim 2 , wherein: an outside diameter of the annular surface and diameters of the first control surface and of the second control surface are the same size.
7. The pressure-regulating arrangement according to claim 2 , wherein: the second control surface is connected via a longitudinal bore of the stepped piston to at least one radial bore of the stepped piston; and said radial bore is arranged between the first control surface and the annular surface.
8. The pressure-regulating arrangement according to claim 2 , wherein: the annular surface is surrounded by an outlet pressure space; and a tank pressure space which is connected to the tank connection via a tank channel is formed between the second control pressure space and the outlet pressure space.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
December 12, 2012
June 23, 2015
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